Requirements engineering
（重定向自Requirement engineering）
Requirements engineering (RE) refers to the process of defining, documenting and maintaining requirements to the sub-fields of systems engineering and software engineering concerned with this process.
The first use of the term requirements engineering was probably in 1979 in a TRW technical report but did not come into general use until the 1990s with the publication of an IEEE Computer Society tutorial and the establishment of a conference series on requirements engineering that has evolved into the current International Requirements Engineering Conference.